Life jacket having function of maintaining body temperature

Abstract

Provided is a life jacket having a function of maintaining body temperature and preventing a drowning accident when water distress occurs. The life jacket includes: an inflatable buoyant member configured to be inflated to provide buoyancy; a jacket including a sealed bag, and being wearable on an upper body of a user; a vacuum pack having a spout and provided inside the sealed bag, the spout being configured such that an end thereof is exposed to an outside of the jacket; a self-triggering inflating body provided inside the vacuum pack; a heating element configured to generate heat by reacting with water flowing into the vacuum pack; and an interlock-type opening member, which is configured to open a stopper by being in conjunction with inflation of the inflatable buoyant member, the stopper being configured to normally close an inlet opening of the spout.

What is claimed is: 
     
         1 . A life jacket having a function of maintaining body temperature, the life jacket comprising:
 an inflatable buoyant member configured to be inflated to provide buoyancy;   a jacket including a sealed bag, and being wearable on an upper body of a user;   a vacuum pack having a spout and provided inside the sealed bag, the spout being configured such that an end thereof is exposed to an outside of the jacket;   a self-triggering inflating body provided inside the vacuum pack;   a heating element configured to generate heat by reacting with water flowing into the vacuum pack; and   an interlock-type opening member, which is configured to open a stopper by being in conjunction with inflation of the inflatable buoyant member, the stopper being configured to normally close an inlet opening of the spout.   
     
     
         2 . The life jacket of  claim 1 , further comprising:
 a cylinder provided in an internal passage of the spout; and   a first check valve configured to open and close a flow path of the cylinder by using pressure difference, the flow path connecting the inlet opening of the spout to an inside of the vacuum pack.   
     
     
         3 . The life jacket of  claim 2 , wherein when pressure inside the vacuum pack is increased due to reaction of the heating element, the cylinder is moved forward to the inlet opening of the spout along the internal passage of the spout, and
 a locking structure is provided on each of an inner wall of the spout and an outer wall of the cylinder so that the inner wall of the spout and the outer wall of the cylinder are locked to each other by the locking structure.   
     
     
         4 . The life jacket of  claim 1 , wherein the spout comprises a second check valve, the second check valve being configured to be opened when pressure inside the vacuum pack is increased, thereby allowing water vapor generated by the heat of the heating element to be discharged to the sealed bag.